<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>大小和类型设置</title>
    <style>
        .box {
            font-size: 20px;
            font-family: "微软雅黑",serif;
        }
    </style>
</head>
<body>
<div class="box">
    你好
</div>
</body>
</html>